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dc.contributor.author Rosa, D. A.
dc.contributor.author Dors Jr., O. L.
dc.contributor.author Krabbe, A. C.
dc.contributor.author Hägele, G. F.
dc.contributor.author Cardaci, Monica Viviana
dc.contributor.author Pastoriza, M. G.
dc.contributor.author Rodrigues, I.
dc.contributor.author Winge, C.
dc.date.available 2017-01-13T18:26:25Z
dc.date.issued 2014-09
dc.identifier.citation Rosa, D. A. ; Dors Jr., O. L. ; Krabbe, A. C.; Hägele, G. F.; Cardaci, Monica Viviana; et al.; Interaction effects on galaxy pairs with Gemini/GMOS - II: Oxygen abundance gradients; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 444; 9-2014; 2005-2021
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/11336/11316
dc.description.abstract In this paper, we derive oxygen abundance gradients from HII regions located in 11 galaxies in eight systems of close pairs. Long-slit spectra in the range 4400?7300 Å were obtained with the Gemini Multi-Object Spectrograph at Gemini South (GMOS-S). Spatial profiles of oxygen abundance in the gaseous phase along galaxy discs were obtained using calibrations based on strong emission lines (N2 and O3N2).We found oxygen gradients to be significantly flatter for all the studied galaxies than those in typical isolated spiral galaxies. Four objects in our sample, AM 1219A, AM 1256B, AM 2030A and AM 2030B, show a clear break in the oxygen abundance at galactocentric radius R/R25 between 0.2 and 0.5. For AM 1219A and AM 1256B, we found negative slopes for the inner gradients, and for AM 2030B, we found a positive slope. All three cases show a flatter behaviour to the outskirts of the galaxies. For AM 2030A, we found a positive slope for the outer gradient, while the inner gradient is almost compatible with a flat behaviour. We found a decrease of star formation efficiency in the zone that corresponds to the oxygen abundance gradient break for AM 1219A and AM 2030B. For the former, a minimum in the estimated metallicities was found very close to the break zone, which could be associated with a corotation radius. However, AM 1256B and AM 2030A, present a star formation rate maximum but not an extreme oxygen abundance value. All four interacting systems that show oxygen gradient breaks have extreme SFR values located very close to break zones.The HII regions located in close pairs of galaxies follow the same relation between the ionization parameter and the oxygen abundance as those regions in isolated galaxies.
dc.format application/pdf
dc.language.iso eng
dc.publisher Oxford University Press
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject Imaging spectroscopy
dc.subject Interstellar abundances
dc.subject Insterstellar medium
dc.subject.classification Astronomía
dc.subject.classification Ciencias Físicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Interaction effects on galaxy pairs with Gemini/GMOS - II: Oxygen abundance gradients
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2017-01-11T13:26:40Z
dc.journal.volume 444
dc.journal.pagination 2005-2021
dc.journal.pais Reino Unido
dc.journal.ciudad Londres
dc.description.fil Fil: Rosa, D. A. . Universidade Do Vale Do Paraiba; Brasil
dc.description.fil Fil: Dors Jr., O. L. . Universidade Do Vale Do Paraiba; Brasil
dc.description.fil Fil: Krabbe, A. C.. Universidade Do Vale Do Paraiba; Brasil
dc.description.fil Fil: Hägele, G. F.. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
dc.description.fil Fil: Cardaci, Monica Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.description.fil Fil: Pastoriza, M. G. . Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil Fil: Rodrigues, I.. Universidade Do Vale Do Paraiba; Brasil
dc.description.fil Fil: Winge, C.. Gemini Observatory; Chile
dc.journal.title Monthly Notices Of The Royal Astronomical Society
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stu1578
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/444/3/2005/1055448/Interaction-effects-on-galaxy-pairs-with-Gemini?redirectedFrom=fulltext


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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)